Connection fastener

ABSTRACT

A connection fastener includes a plurality of fasteners, a sheet-shaped connection portion and attaching portions. Each fastener includes a head portion provided at one end portion side and a tapered leading end portion provided at the other end portion side. The sheet-shaped connection portion is configured to connect the plurality of fasteners in a parallel direction. The attaching portions are separate from the connection portion attached to the fasteners such that each attaching portion covers at least one part of each leading end portion. The connection portion includes first holding portions and second holding portions. Each of the first holding portions is configured to support a head portion side of each fastener. Each of the second holding portions is configured to support at least one part of a circumferential surface of each attaching portion.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on and claims priority under 35 USC 119 fromJapanese Patent Application Nos. P2016-139922 filed on Jul. 15, 2016 andP2017-096995 filed on May 16, 2017.

TECHNICAL FIELD

The present invention relates to a connection fastener used for adriving tool.

BACKGROUND

Since a connection fastener for connecting a plurality of fasteners witha connection band can set a great deal of fasteners to a driving tool enbloc and continuously inject the great deal of fasteners, the connectionfastener is used in various driving tools. The connection band of thisconnection fastener holds the fastener in two upper and lower places asdescribed in, for instance, JP-U-A-H03-96417, and thereby can stablyhold the fastener.

SUMMARY

Among the driving tools mentioned above, one capable of using aplurality of types of fasteners having different lengths is present. Aconnection fastener used for this driving tool uses a connection bandaccording to specifications of the tool, and thereby enables use for thesame tool even when the connection fasteners have different lengths. Inother words, a shape or the like of the connection band is designated bythe specifications of the tool, and cannot be freely changed. Forexample, a vertical width (a distance between a lower holding portionand an upper holding portion) of the connection band is designated by awidth capable of corresponding to a feed motion of the connectionfastener of the tool and a discharge motion of the connection band, andcannot be freely changed.

For this reason, when a fastener in which a length of a shank (astraight portion between a head portion and a tapered leading endportion of the fastener or a straight portion between an under-headtapered portion and the tapered leading end portion. The straightportion may be gently tapered) of the fastener is shorter than avertical width of the connection band is to be used, there is a problemthat the shank of the fastener cannot be held in two upper and lowerplaces by the connection band and the fastener is not stably held. Whenthe connection band cannot stably hold the fastener, this causes anobstacle that the fastener driven in an oblique state is buckled or thatthe connection band removed and spread from the fastener is pulled intoa machine so that the feed motion of the connection fastener is notsmoothly performed. Under these circumstances, the fastener that cannotbe held by the connection band regulated by the tool in the related artcannot be used, and restrictions are placed on a length of the fastenerthat can be used by a tool.

An object of the present invention is to provide a connection fastenercapable of stably supporting short fasteners even when a width of aconnection band (a connection portion) is regulated by a tool, andthereby using the short fasteners without changing specifications of thetool.

The present invention was made to solve the above problem, and ischaracterized by the following.

-   (1) A connection fastener includes:    -   a plurality of fasteners each of which includes a head portion        provided at one end portion side and a tapered leading end        portion provided at the other end portion side;    -   a sheet-shaped connection portion that is configured to connect        the plurality of fasteners in a parallel direction; and    -   attaching portions that are separate from the connection portion        attached to the fasteners such that each attaching portion        covers at least one part of each leading end portion,    -   wherein the connection portion includes:        -   first holding portions each of which is configured to            support a head portion side of each fastener; and        -   second holding portions each of which is configured to            support at least one part of a circumferential surface of            each attaching portion.-   (2) The connection fastener according to (1), wherein:    -   the connection portion includes second holding holes which        support the attaching portions provided at the second holding        portions, and first holding holes which support the head portion        sides of the fasteners provided at the first holding portions;        and    -   diameters of the second holding holes are larger than diameters        of the first holding holes.-   (3) The connection fastener according to (1) or (2), wherein:    -   the connection portion includes second holding holes which        support the attaching portions provided at the second holding        portions, and first holding holes which support the head portion        sides of the fasteners provided at the first holding portions;        and    -   opening widths of opening slits of the second holding holes are        larger than opening widths of opening slits of the first holding        holes.-   (4) The connection fastener according to any one of (1) to (3),    wherein:    -   each of the fasteners includes a shank continuously provided        between the head portion and the leading end portion; and    -   the second holding portions support the attaching portions at        positions at which the second holding portions overlap the        tapered leading end portions of the fasteners or at positions at        which the second holding portions do not overlap the fasteners,        when viewed from a side direction of the fastener.-   (5) The connection fastener according to any one of (1) to (4),    wherein:    -   the connection portion is formed by bending one long sheet in a        C shape;    -   the first holding portions, the second holding portions, and a        band-shaped portion connecting the first holding portions and        the second holding portions are formed on the same plane in the        long sheet;    -   each of the fasteners includes a shank continuously provided        between the head portion and the leading end portion; and    -   in an axial direction of the fastener, a length of the shank is        shorter than a length of the band-shaped portion.-   (6) The connection fastener according to (5), wherein:    -   each fastener includes a stepped portion at the shank; and    -   the stepped portion is formed such that an outer diameter of a        leading end portion side is smaller than an outer diameter of        the head portion side, and faces an upper edge portion of the        attaching portion.-   (7) The connection fastener according to any one of (1) to (6),    wherein    -   each of the attaching portions includes a flange portion        protruding in an outer circumferential direction below the        second holding portion.-   (8) The connection fastener according to any one of (1) to (7),    wherein    -   each of the attaching portions includes a fall-preventing shape        for preventing the second holding portion from falling off.-   (9) The connection fastener according to (8), wherein the    fall-preventing shape is a tapered shape which diameter is gradually    increased toward a leading end portion side of the fastener.-   (10) The connection fastener according to (8), wherein the    fall-preventing shape is a stepped shape formed by making a large    diameter of the attaching portion in a leading end portion side of    the fastener or a concave shape of a circumferential groove shape.-   (11) The connection fastener according to (8), wherein the    fall-preventing shape is a bulgy shape in which the attaching    portion in the head side of the fastener is swollen in an outer    circumferential direction or a large diameter shape formed by making    a large diameter of the attaching portion in the head side of the    fastener.

According to the first aspect of the invention, the connection fastenerincludes: a plurality of fasteners each of which includes a head portionprovided at one end portion side and a tapered leading end portionprovided at the other end portion side; a sheet-shaped connectionportion that is configured to connect the plurality of fasteners in aparallel direction; and attaching portions that are separate from theconnection portion attached to the fasteners such that each attachingportion covers at least one part of each leading end portion. Theconnection portion includes: first holding portions each of which isconfigured to support ahead portion side of each fastener; and secondholding portions each of which is configured to support at least onepart of a circumferential surface of each attaching portion. Accordingto this configuration, since the fasteners are stretched by theattaching portions and can be held by the second holding portions, evenwhen a width of the connection portion is regulated by a tool, thefasteners can be stably supported regardless of lengths of thefasteners.

Since the attaching portions are members which are separate from and areindependent of the connection portion, the attaching portions are notpulled and inclined by the connection portion when removed from theconnection portion. Therefore, the fasteners can be prevented from beinginclined and buckled. No energy is lost to cut the connection portion.

The attaching portion that is more easily stabilized in dimensionalprecision than the fastener formed of a metal is used. Thereby,dimensions of the attaching portions and dimensions of the secondholding portions can be made compatible with each other, and a holdingforce of the fastener held via the attaching portion by the secondholding portion can be enhanced.

The attaching portion is attached to the fastener, and thereby adiameter of the toe side (the leading end portion side) of the fasteneris increased. For this reason, the fastener is prevented from fallingwithin an injection path during driving. Therefore, it is possible tostabilize a driving posture of the fastener to prevent buckling.

According to the second aspect of the invention, the diameter of thesecond holding hole holding the attaching portion provided at the secondholding portion is larger than that of the first holding hole holdingthe head portion side of the fastener provided at the first holdingportion. According to this configuration, the shank of the fastener isheld by the first holding hole having a relatively small diameter, andthe attaching portion is held by the second holding hole having arelatively large diameter. Thus, the fastener can be tightly held evenat the second portion thickened by the amount of attaching the attachingportion.

According to the third aspect of the invention, the opening width of theopening slit (opening edge) of the second holding hole that supports andholds the attaching portion provided at the second holding portion islarger than that of the opening slit (opening edge) of the first holdinghole that supports and holds the head portion side of the fastenerprovided at the first holding portion. According to this configuration,when the fastener is loaded on the connection portion, the shank of thefastener is loaded and held by the first holding hole whose opening slit(opening edge) has a relatively small opening width, and the attachingportion is loaded and held by the second holding hole whose opening slit(opening edge) has a relatively large opening width. Thus, the fastenercan be loaded and held even at the lower portion thickened by the amountof attaching the attaching portion without difficulty, andassemblability is good. Even when the fastener is driven, the openingwidth of the opening slit (opening edge) of the second holding hole islarge, and thus the fastener can be smoothly removed from the connectionportion.

According to the fourth aspect of the invention, the fastener includesthe shank provided between the head portion and the leading end portion,and the second holding portion supports and holds the attaching portionat the position at which the second holding portion overlaps the taperedleading end portion of the fastener or at the position at which thesecond holding portion does not overlap the fastener. According to thisconfiguration, even in the short fastener located at the position atwhich the second holding portion overlaps the leading end portion of thefastener or at the position at which the second holding portion does notoverlap the fastener, this short fastener is stretched by the attachingportion, and is held by the second holding portion. Thus, the shortfastener limited by specifications of the tool so far can be used. Sinceeven the short fastener is stably held, and since the driving posture ofthe fastener is stable, the buckling during driving can be prevented.

According to the fifth aspect of the invention, when viewed in the axialdirection of the fastener, the length of the shank is shorter than thatof the band-shaped portion. According to this configuration, even in theshort fastener in which the length of the shank is shorter than that ofthe band-shaped portion, this short fastener is stretched by theattaching portion, and is held by the second holding portion. Thus,upper and lower portions of the shank of the fastener can be reliablyheld.

According to the sixth aspect of the invention, the fastener includesthe stepped portion at the shank. The stepped portion is formed suchthat the outer diameter of the leading end portion side is smaller thanthat of the head side, and faces the upper edge portion of the attachingportion. According to this configuration, when the attaching portion isattached to the fastener, the position of the attaching portion dependson the stepped portion, and thus a problem that the attached position ofthe attaching portion to the fastener is made too shallow or too deepcan be avoided.

According to the seventh aspect of the invention, the attaching portionincludes the flange portion protruding below the second holding portionin the outer circumferential direction. According to this configuration,since the second holding portion is prevented from falling off by theflange portion, the second holding portion is prevented from beingremoved from the attaching portion.

The flange portion is provided, and thereby the diameter of the toe sideof the fastener is increased. Thus, an effect of preventing the fastenerfrom falling within the injection path during driving can be enhanced.Therefore, it is possible to stabilize the driving posture of thefastener to prevent the buckling.

According to the eighth aspect of the invention, the attaching portionincludes the fall-preventing shape for preventing the second holdingportion from falling off. According to this configuration, since thesecond holding portion is prevented from falling off by thefall-preventing shape, the second holding portion is prevented frombeing removed from the attaching portion.

When the fall-preventing shape is provided for the fastener, there is aproblem that penetration resistance of the fastener is increased or thatthe fastener is easily buckled. However, the fall-preventing shape isprovided for the attaching portion, and thereby such a problem does notoccur.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a connection fastener;

FIG. 2A is a partial sectional view of the connection fastener, and FIG.2B is a sectional view of a conventional connection fastener;

FIG. 3A is a development view of a connection band (a connectionportion), and FIG. 3B is a side view of the connection band (theconnection portion);

FIG. 4A is a top view of a tubular member (an attaching portion), andFIG. 4B is a sectional view of the tubular member (the attachingportion);

FIGS. 5A and 5B are views illustrating postures during driving; whereinFIG. 5A is a view when the tubular member is present and FIG. 5B is aview when the tubular member is not present;

FIGS. 6A to 6D are views illustrating postures during driving accordingto the present embodiment; wherein FIG. 6A is a view before a fastenercomes into contact with a driver, FIG. 6B is a view just after thefastener comes into contact with the driver, FIG. 6C is a view of astate in which the tubular member is removed from the connection band,and FIG. 6D is a view of a state in which the fastener is severed fromthe connection band;

FIGS. 7A and 7C are views illustrating postures during driving when thetubular member is formed integrally with the connection band; whereinFIG. 7A is a view before the fastener comes into contact with a driver,FIG. 7B is a view just after the fastener comes into contact with thedriver, and FIG. 7C is a view of a state in which the tubular member issevered from the connection band;

FIGS. 8A and 8B are views according to a modification; wherein FIG. 8Ais a partial sectional view of the connection fastener in which a shortfastener is used and FIG. 8B is a partial sectional view of theconnection fastener in which the connection band is pressed by a flangeportion;

FIGS. 9A and 9B are views according to a modification; wherein FIG. 9Ais a partial sectional view of the connection fastener in which a nailis used and FIG. 9B is a partial sectional view of the connectionfastener in which a screw is used;

FIGS. 10A to 10C are views according to a modification in which thetubular member without a flange portion is used; wherein FIG. 10A is apartial sectional view of the connection fastener in which a shortfastener is used, FIG. 10B is a partial sectional view of the connectionfastener in which a fastener having a medium length is used, and FIG.10C is a partial sectional view of the connection fastener in which along fastener is used;

FIGS. 11A to 11E are views according to a modification; wherein FIG. 11Ais a partial sectional view of the connection fastener having anfall-preventing shape of a tapered shape, FIG. 11B is a partialsectional view of the connection fastener having an fall-preventingshape of a stepped shape, FIG. 11C is a partial sectional view of theconnection fastener having an fall-preventing shape of a concave shape,FIG. 11D is a partial sectional view of the connection fastener havingan fall-preventing shape of a bulgy shape, and FIG. 11E is a partialsectional view of the connection fastener having an fall-preventingshape of a large diameter shape; and

FIGS. 12A and 12B are views according to a modification; wherein FIG.12A is a side view of the connection fastener in which a stepped portionis provided for the tubular member, and FIG. 12B is a partial sectionalview of the connection fastener in which the stepped portion is providedfor the tubular member.

DETAILED DESCRIPTION

A connection fastener 10 according to the present embodiment will bedescribed with reference to the drawings.

As illustrated in FIG. 1, the connection fastener 10 according to thepresent embodiment is configured to connect a plurality of fasteners 11with a connection band (a connection portion) 20, so that a great dealof fasteners 11 can be set for a driving tool en bloc and becontinuously injected. Although particularly not illustrated, thedriving tool is provided with a magazine for containing the connectionfastener 10, and a feed mechanism for feeding the connection fastener 10stored in the magazine to a leading end portion of a tool main bodythereof. The feed mechanism is linked to a driving motion and feeds theconnection fastener 10 one by one, thereby setting the fastener 11 inthe forefront of the connection fastener 10 for an injection path 40provided at the leading end portion of the tool main body. The fastener11 set for the injection path 40 in this way is driven out by a driver41 operated by a striking mechanism of the driving tool. The fastener 11driven out by the driver 41 passes through the injection path 40 and isinjected from an injection port provided at the leading end portion ofthe tool main body.

The connection fastener 10 according to the present embodiment arrangesand connects the fasteners 11 in parallel (in a parallel direction) suchthat a line connecting the centers of the fasteners 11 becomes astraight line. Thereby, the connection fastener 10 is formed in astraight band shape.

The fastener 11 according to the present embodiment is a concrete pinthat is driven into, for instance, concrete or a siding member, and is,as illustrated in FIG. 2A, provided with a head portion 12, anunder-head tapered portion 13 that is continuous to the head portion 12,a shank 14 that is continuous to the under-head tapered portion 13, anda tapered leading end portion 15 that is continuous to the shank 14. Thehead portion 12 is a discoid region being subject to the driving of thedriver 41. The under-head tapered portion 13 is for smoothly connectingthe head portion 12 and the shank 14, and is a region whose diameter isgradually reduced in a direction from the head portion 12 to the shank14. The shank 14 is a region that is formed in a columnar shape andgenerates pullout resistance when driven into a driven material. Theleading end portion 15 is a region that is formed in a pointed shape andis pierced into a driven material. In the present embodiment, theleading end portion 15 is formed in a shell shape.

The fastener 11 may have a shape with a head portion, a shank of agently tapered shape that is continuous to the head portion (wherein anunder-head tapered portion that is continuous to the head portion may bepresent between the head portion and the shank), and a tapered leadingend portion that is continuous to the shank.

A stepped portion 14 a for reducing penetration resistance iscontinuously formed at the shank 14 of the fastener 11 according to thepresent embodiment. For this reason, a diameter of the shank 14 isconfigured such that, in comparison with a diameter of a straightportion closer to the head portion 12 than the stepped portion 14 a, adiameter of a straight portion closer to the leading end portion 15 thanthe stepped portion 14 a is smaller.

A cylindrical member 30 acting as a tubular member (an attachingportion) is attached to the shank 14 of the fastener 11. The cylindricalmember 30 is a member formed of aluminum or a synthetic resin and, asillustrated in FIGS. 4A and 4B, includes a tubular portion 31 and aflange portion 33 formed to protrude from an opening edge of the tubularportion 31.

The flange portion 33 may protrude below a lower holding portion 23 inan outer circumferential direction or be provided at a position otherthan the opening edge. For example, the flange portion 33 may be formedon an outer circumferential surface of the tubular portion 31 toprotrude in a radial direction.

In addition, the flange portion 33 may be formed separately from andindependently of the tubular portion 31. A shape of the flange portion33 is not limited to a circular shape as shown in FIG. 4A, but it may bea shape in which an outer circumference is on a cylindrical locus. Forexample, the shape of the flange portion 33 may be a polygonal shape ora rectangular shape having a cutout portion. Similarly, a shape of thecylindrical member 30 is not also limited to a circular shape, but itmay be a tubular shape in which an inner circumference is on acylindrical locus. For example, the cylindrical member 30 may be atubular member having a polygonal shape or a rectangular shape whichforms a cutout portion such that the tubular member covers at least onepart of the shank 14.

An inner diameter of the tubular portion 31 is formed in such a size asto be able to forcibly insert the shank 14 of the fastener 11 (which iscloser to the leading end portion 15 than the stepped portion 14 a). Theleading end portion 15 of the fastener 11 is inserted into the tubularportion 31, and thereby the cylindrical member 30 can be attached to thefastener 11. In the present embodiment, as illustrated in FIG. 2A, thefastener 11 can be inserted up to a position where the stepped portion14 a reaches an upper edge portion 32 of the cylindrical member 30, andan inserted position of the cylindrical member 30 into the fastener 11is configured to be determined by the stepped portion 14 a, so thatassemblability is good.

The connection band 20 connecting the fasteners 11 is a sheet-shapedmember as shown in FIGS. 3A and 3B, and is formed of a synthetic resinin the present embodiment. Although it is shown in the figure that theconnection band 20 is short in length, the connection band 20 isactually formed from one long sheet in which the same shape iscontinuous in a vertical direction of FIG. 3A.

This connection band 20 is provided with upper holding portions (firstholding portions) 22, each of which holds the head portion 12 side ofthe fastener 11, lower holding portions (second holding portions) 23,each of which supports and holds the cylindrical member 30 attached tothe fastener 11, and a band-shaped portion 21 that connects the upperholding portions 22 and the lower holding portions 23. The upper holdingportions 22 and the lower holding portions 23 are provided by the samenumber to be correspond to each other, and one fastener 11 is configuredto be held by a pair of corresponding upper and lower holding portions22 and 23. The band-shaped portion 21 runs in a longitudinal directionto connect all of the upper and lower holding portions 22 and 23.

In this connection band 20, the upper holding portions 22, the lowerholding portions 23, and the band-shaped portion 21 are formed on thesame plane, and a folding groove 20 a is formed between the upperholding portions 22 and the band-shaped portion 21 and between the lowerholding portions 23 and the band-shaped portion 21. The connection band20 is folded along the folding groove 20 a. Thereby, as illustrated inFIG. 2A, the connection band 20 formed from one long sheet is deformedin a C shape to support and hold the fasteners 11.

As illustrated in FIG. 2A, the upper holding portion 22 supports andholds the top of the shank 14 of the fastener 11. As illustrated in FIG.3A, the upper holding portion 22 is provided with an upper slit 22 awhose width is narrower than a maximum diameter of the shank 14 of thefastener 11, and an upper holding hole (a first holding hole) 22 b thatis provided behind the upper slit 22 a. A diameter of the upper holdinghole 22 b is greater than the maximum diameter of the shank 14 of thefastener 11. The upper slit 22 a is provided as an opening edge of theupper holding hole 22 b, and communicates with the upper holding hole 22b.

As illustrated in FIG. 2A, the lower holding portion 23 supports andholds the tubular portion 31 of the cylindrical member 30. Additionally,the lower holding portion 23 may be configured to support and hold atleast one part of a circumferential surface of the cylindrical member30. As illustrated in FIG. 3A, the lower holding portion 23 is providedwith a lower slit 23 a whose width is narrower than a diameter of thetubular portion 31 of the cylindrical member 30, and a lower holdinghole (a second holding hole) 23 b that is provided behind the lower slit23 a. A diameter of the lower holding hole 23 b is greater than thediameter of the tubular portion 31 of the cylindrical member 30. Thelower slit 23 a is provided as an opening edge of the lower holding hole23 b, and communicates with the lower holding hole 23 b.

At this time, the width DW1 of the lower slit 23 a (an opening width ofthe opening slit (opening edge) of the lower holding hole 23 b) isformed to be greater than the width UW1 of the upper slit 22 a (anopening width of the opening slit (opening edge) of the upper holdinghole 22 b), and a diameter DW2 of the lower holding hole 23 b is formedto be greater than a diameter UW2 of the upper holding hole 22 b.

With this formation, an inner diameter of the lower holding hole 23 b isincreased depending on a lower portion of the fastener 11 which isthickened by the amount of attaching the cylindrical member 30, and thefastener 11 can be stably held.

When the fastener 11 is loaded on the connection band 20, the shank 14of the fastener 11 is loaded from the upper slit 22 a to the upperholding hole 22 b, and the cylindrical member 30 is loaded from thelower slit 23 a to the lower holding hole 23 b. At this time, since thewidth DW1 of the lower slit 23 a is increased depending on the lowerportion of the fastener 11 which is thickened by the amount of attachingthe cylindrical member 30, the fastener 11 can be loaded and heldwithout difficulty, and the assemblability is good.

Even when the fastener 11 is driven, since the width DW1 of the lowerslit 23 a is great, the fastener 11 can be smoothly removed from theconnection band 20.

Meanwhile, as illustrated in FIG. 3A, feeding holes 21 a are formed inthe band-shaped portion 21 of the connection band 20 at the sameintervals as those at which the fasteners 11 are held. The feeding holes21 a are intended for use of the feed mechanism of the driving tool.That is, the feed mechanism is operated with feed claws thereof engagedwith the feeding holes 21 a, and thereby the fasteners 11 are configuredto be fed to the injection path 40 in turn. A width of the band-shapedportion 21 having these feeding holes 21 a (a length H1 of theband-shaped portion 21 when viewed in an axial direction of the fastener11) (see FIG. 2A) is regulated by the driving tool, and cannot be easilychanged. For example, when the length H1 of the band-shaped portion 21is reduced, the feed mechanism cannot normally perform the feedoperation. Therefore, the length H1 of the band-shaped portion 21 cannotbe changed. However, a structure of the related art has a problem that,since the length H1 of the band-shaped portion 21 cannot be reduced,short fasteners 11 cannot be held by the connection band 20.

For example, in the present embodiment, as illustrated in FIG. 2A, whenviewed in the axial direction of the fastener 11, a length H2 of theshank 14 of the fastener 11 is configured to be shorter than the lengthH1 of the band-shaped portion 21 of the connection band 20.

For this reason, the lower holding portion 23 is located at a positionat which it overlaps the leading end portion 15 of the fastener 11. Whenthis short fastener 11 is to be held in the structure of the relatedart, there is a possibility of the lower holding portion 23 falling outof the leading end portion 15 of the fastener 11 as illustrated in FIG.2B, and the fastener 11 cannot be reliably held. In this regard,according to the present embodiment, since the cylindrical member 30 isattached to the fastener 11, and since the lower holding portion 23supports and holds the cylindrical member 30, the upper and lowerportions of the fastener 11 can be reliably held. Therefore, the shortfastener 11 limited by specifications of the tool so far can be used,and buckling during driving can be prevented because the driving postureof the fastener 11 is stable.

In the present embodiment, as illustrated in FIG. 5A, when the fastener11 is driven by the driver 41 within the injection path 40 of thedriving tool, the fastener 11 moves within the injection path 40 withthe cylindrical member 30 attached to a toe of the fastener 11. For thisreason, a tilt of the fastener 11 is suppressed. When the cylindricalmember 30 is not present, the fastener 11 is inclined within theinjection path 40 and is obliquely driven as illustrated in FIG. 5B,which is attributed to the buckling or the like of the fastener 11. Inthis way, as the cylindrical member 30 is attached to the toe (theleading end portion 15 side) of the fastener 11, the connection fastener10 according to the present embodiment is configured to be able toprevent the buckling during driving.

In the present embodiment, since the cylindrical member 30 is providedseparately from and independently of the connection band 20, there is noneed to sever the cylindrical member 30 from the connection band 20during driving of the fastener 11. For this reason, when the fastener 11is driven by the driver 41 within the injection path 40 of the drivingtool, the cylindrical member 30 is removed from the connection band 20as illustrated in FIGS. 6A to 6D, but the cylindrical member 30 is notpulled and inclined by the connection band 20. Therefore, the fastener11 can be prevented from being inclined and buckled. Energy is not lostin order to cut the connection band 20.

When the cylindrical member 30 is provided as a part of the connectionband 20, the cylindrical member 30 is pulled by the connection band 20when severed from the connection band 20 as illustrated in FIGS. 7A to7C, so that the cylindrical member 30 is inclined. For this reason,there is a possibility of the fastener 11 being inclined and buckled.The loss of energy to cut the connection band 20 is caused. In thisregard, when the connection band 20 and the cylindrical member 30 areseparately provided as in the present embodiment, this problem does notoccur.

In the above embodiment, the example in which the lower holding portion23 supports and holds the cylindrical member 30 at a position at whichit overlaps the leading end portion 15 of the fastener 11 when viewedfrom a side direction of the fastener 11 has been described. In otherwords, the lower holding portion 23 supports and holds the cylindricalmember 30 at a position at which the tapered leading end portion 15 ofthe fasteners 11 reaches the lower holding portion 23 in the axialdirection of the fasteners 11. But, the embodiment is not limitedthereto. As illustrated in FIG. 8A, the lower holding portion 23 may beconfigured to support and hold the cylindrical member 30 at a positionat which it does not overlap the fastener 11 when viewed from a sidedirection of the fastener 11. In other words, the lower holding portion23 supports and holds the cylindrical member 30 at a position at whichthe tapered leading end portion 15 of the fasteners 11 does not reachthe lower holding portion 23 in the axial direction of the fasteners 11.Even when the very short fastener 11 is used in this way, the fastener11 is lengthened by the cylindrical member 30, and thereby the fastener11 can be stably held.

As illustrated in FIG. 8B, the flange portion 33 of the cylindricalmember 30 may be disposed to make it possible to come into contact witha lower portion of the lower holding portion 23. Thereby, sincespreading of the lower holding portion 23 can be suppressed by theflange portion 33, the lower holding portion 23 can be prevented frombeing removed from the cylindrical member 30.

In the above embodiment, the concrete pin has been described as thefastener 11 by way of example, but the embodiment is not limitedthereto. For example, as illustrated in FIG. 9A, a nail may be used asthe fastener 11. In addition, as illustrated in FIG. 9B, a screw may beused as the fastener 11.

In the above embodiment, the flange portion 33 is provided for thecylindrical member 30, but the embodiment is not limited thereto. Asillustrated in FIG. 10A, the flange portion 33 may not be provided forthe cylindrical member 30. In addition, as illustrated in FIGS. 10B and10C, a long fastener 11 may be used.

As illustrated in FIGS. 11A to 11E, a fall-preventing shape forpreventing the lower holding portion 23 from falling off may be providedfor the cylindrical member 30.

For example, as illustrated in FIG. 11A, the tubular portion 31 of thecylindrical member 30 has a tapered shape 34 whose diameter is graduallyincreased in a direction of a leading end portion thereof, and thetapered shape 34 is held by the lower holding portion 23. Thereby, afall-preventing shape for preventing the lower holding portion 23 fromfalling off may be formed. In this configuration, besides being able topreventing the lower holding portion 23 from falling off, when thefastener 11 is loaded on the connection band 20, an inserted position ofthe lower holding portion 23 of the connection band 20 can depend on thetapered shape 34, and thus the assemblability can be improved. When thefastener 11 is driven, the cylindrical member 30 of the tapered shape 34falls off from the lower holding portion 23 as it is, and thus thefastener 11 can be smoothly removed from the connection band 20.

As illustrated in FIG. 11B, a stepped shape 35 having a large diameteris formed at a leading end portion side of the tubular portion 31 of thecylindrical member 30, and the lower holding portion 23 is engaged withthis stepped shape 35. Thereby, the tubular portion 31 of thecylindrical member 30 may be formed in the fall-preventing shape forpreventing the lower holding portion 23 from falling off. In thisconfiguration, besides being able to preventing the lower holdingportion 23 from falling off, when the fastener 11 is loaded on theconnection band 20, the inserted position of the lower holding portion23 of the connection band 20 can depend on the stepped shape 35, andthus the assemblability can be improved.

As illustrated in FIG. 11C, a concave shape 36 is formed at the tubularportion 31 of the cylindrical member 30 in a circumferential grooveshape, and the lower holding portion 23 is engaged with this concaveshape 36. Thereby, the tubular portion 31 of the cylindrical member 30may be formed in the fall-preventing shape for preventing the lowerholding portion 23 from falling off. In this configuration, besidesbeing able to preventing the lower holding portion 23 from falling off,when the fastener 11 is loaded on the connection band 20, the insertedposition of the lower holding portion 23 of the connection band 20 candepend on the concave shape 36, and thus the assemblability can beimproved.

As illustrated in FIG. 11D, a bulgy shape 37 swollen in an outercircumferential direction is provided at the leading end portion side ofthe tubular portion 31 of the cylindrical member 30, and the lowerholding portion 23 is engaged with this bulgy shape 37. Thereby, thetubular portion 31 of the cylindrical member 30 may be formed in thefall-preventing shape for preventing the lower holding portion 23 fromfalling off. In this configuration, besides being able to preventing thelower holding portion 23 from falling off, when the fastener 11 isloaded on the connection band 20, the inserted position of the lowerholding portion 23 of the connection band 20 can depend on the bulgyshape 37, and thus the assemblability can be improved.

As illustrated in FIG. 11E, a large diameter shape 38 is formed bymaking a large diameter for the leading end portion side of the tubularportion 31 of the cylindrical member 30, and the large diameter shape 38is held by the lower holding portion 23. Thereby, the tubular portion 31of the cylindrical member 30 may be formed in the fall-preventing shapefor preventing the lower holding portion 23 from falling off. In thisconfiguration, besides being able to preventing the lower holdingportion 23 from falling off, when the fastener 11 is loaded on theconnection band 20, the inserted position of the lower holding portion23 of the connection band 20 can depend on the large diameter shape 38,and thus the assemblability can be improved.

As illustrated in FIGS. 12A and 12B, a stepped portion 39 may beprovided at the tubular portion 31 of the cylindrical member 30. Byproviding this stepped portion 39, a leading end portion side of thestepped portion 39 is formed to be larger in diameter than a trailingend portion side of the stepped portion 39. This stepped portion 39 isdisposed closer to the toe side (the leading end portion 15 side) of thefastener 11 than the lower holding portion 23, and is configured not tobe contact with the lower holding portion 23. Even in thisconfiguration, as in the form shown in FIG. 11B, the lower holdingportion 23 can be inhibited from being spread by the stepped portion 39,and the tubular portion 31 of the cylindrical member 30 can be formed inthe fall-preventing shape for preventing the lower holding portion 23from falling off.

In the example shown in FIGS. 12A and 12B, the stepped portion 39 isformed by corners whose cross sections are formed at a right angle. Inthis way, the corners of the stepped portion 39 are formed at a rightangle, and thereby the lower holding portion 23 is easily caught, andthus an effect of preventing the spread of the lower holding portion 23can be enhanced. However, the corners of the stepped portion 39 are notlimited to the right angle, and may have an R shape as small aspossible.

As described above, according to the present embodiment, the connectionband 20 including the cylindrical member 30 attached to the fastener 11is provided with the upper holding portions 22, each of which supportsand holds the head portion 12 side of the fastener 11, and the lowerholding portions 23, each of which supports and holds the cylindricalmember 30 attached to the fastener 11. According to this configuration,since the fasteners 11 are stretched by the cylindrical members 30 andare held by the lower holding portions 23, even when the width of theconnection band 20 is regulated by the tool, the fasteners 11 can bestably supported regardless of the lengths of the fasteners 11.

Since the cylindrical members 30 are members which are separate from andare independent of the connection band 20, the cylindrical members 30are not pulled and inclined by the connection band 20 when removed fromthe connection band 20. Therefore, the fasteners 11 can be preventedfrom being inclined and buckled. No energy is lost to cut the connectionband 20.

The cylindrical member 30 that is more easily stabilized in dimensionalprecision than the fastener 11 formed of a metal is used. Thereby,dimensions of the cylindrical member 30 and dimensions of the lowerholding portion 23 can be made compatible with each other, and a holdingforce of the fastener 11 held via the cylindrical member 30 by the lowerholding portion 23 can be enhanced.

The cylindrical member 30 is attached to the fastener 11, and therebythe diameter of the toe side (the leading end portion 15 side) of thefastener 11 is increased. For this reason, the fastener 11 is preventedfrom falling within the injection path 40 during driving. Therefore, itis possible to stabilize the driving posture of the fastener 11 toprevent the buckling.

The diameter of the lower holding hole 23 b holding the cylindricalmember 30 provided at the lower holding portion 23 is larger than thatof the upper holding hole 22 b holding the head portion 12 side of thefastener 11 provided at the upper holding portion 22. According to thisconfiguration, the shank 14 of the fastener 11 is held by the upperholding hole 22 b having a relatively small diameter, and thecylindrical member 30 is held by the lower holding hole 23 b having arelatively large diameter. Thus, the fastener 11 can be tightly heldeven at the lower portion thickened by the amount of attaching thecylindrical member 30.

The lower holding portion 23 supports and holds the cylindrical member30 at a position at which it overlaps the tapered leading end portion 15of the fastener 11 or at a position at which it does not overlap thefastener 11. According to this configuration, even in the short fastener11 located at the position at which the lower holding portion 23overlaps the leading end portion 15 of the fastener 11 or at theposition at which the lower holding portion 23 does not overlap thefastener 11, this short fastener 11 is stretched by the cylindricalmember 30, and is held by the lower holding portion 23. Thus, thefastener 11 can be stably held.

When viewed in the axial direction of the fastener 11, the length H2 ofthe shank 14 is shorter than the length H1 of the band-shaped portion21. According to this configuration, even in the short fastener 11 inwhich the length H2 of the shank 14 is shorter than the length H1 of theband-shaped portion 21, this short fastener 11 is stretched by thecylindrical member 30, and is held by the lower holding portion 23.Thus, the fastener 11 can be stably held.

The cylindrical member 30 includes the flange portion 33 that faces thelower portion of the lower holding portion 23 and is formed to protrudein a radial direction of the outer circumference of the cylindricalmember 30. According to this configuration, since the lower holdingportion 23 is prevented from falling off by the flange portion 33, thelower holding portion 23 is prevented from being removed from thecylindrical member 30.

The flange portion 33 is provided, and thereby the diameter of the toeside of the fastener 11 is increased. Thus, an effect of preventing thefastener 11 from falling within the injection path 40 during driving canbe enhanced. Therefore, it is possible to stabilize the driving postureof the fastener 11 to prevent the buckling.

The fastener 11 includes the stepped portion 14 a at the shank 14, andthe stepped portion 14 a is formed such that the outer diameter thereofclose to the leading end portion 15 is smaller than that close to thehead portion 12, and faces the upper edge portion 32 of the cylindricalmember 30. According to this configuration, when the cylindrical member30 is attached to the fastener 11, the position of the cylindricalmember 30 depends on the stepped portion 14 a, and thus a problem thatthe attached position of the cylindrical member 30 to the fastener 11 ismade too shallow or too deep can be avoided.

The cylindrical member 30 includes the fall-preventing shape forpreventing the lower holding portion 23 from falling off. According tothis configuration, since the lower holding portion 23 is prevented fromfalling off by the fall-preventing shape, the lower holding portion 23is prevented from being removed from the cylindrical member 30.

When the fall-preventing shape is provided for the fastener 11, there isa problem that the penetration resistance of the fastener 11 isincreased or that the fastener 11 is easily buckled. However, thefall-preventing shape is provided for the cylindrical member 30, andthereby such a problem does not occur.

-   (1) A connection fastener includes:    -   a plurality of fasteners each of which includes a head portion        provided at one end portion side and a tapered leading end        portion provided at the other end portion side;    -   a sheet-shaped connection portion that is configured to connect        the plurality of fasteners in a parallel direction; and    -   attaching portions that are separate from the connection portion        attached to the fasteners such that each attaching portion        covers at least one part of each leading end portion,    -   wherein the connection portion includes:        -   first holding portions each of which is configured to            support a head portion side of each fastener; and        -   second holding portions each of which is configured to            support at least one part of a circumferential surface of            each attaching portion.-   (2) The connection fastener according to (1), wherein:    -   the connection portion includes second holding holes which        support the attaching portions provided at the second holding        portions, and first holding holes which support the head portion        sides of the fasteners provided at the first holding portions;        and    -   diameters of the second holding holes are larger than diameters        of the first holding holes.-   (3) The connection fastener according to (1) or (2), wherein:    -   the connection portion includes second holding holes which        support the attaching portions provided at the second holding        portions, and first holding holes which support the head portion        sides of the fasteners provided at the first holding portions;        and    -   opening widths of opening slits of the second holding holes are        larger than opening widths of opening slits of the first holding        holes.-   (4) The connection fastener according to any one of (1) to (3),    wherein:    -   each of the fasteners includes a shank continuously provided        between the head portion and the leading end portion; and    -   the second holding portions support the attaching portions at        positions at which the second holding portions overlap the        tapered leading end portions of the fasteners or at positions at        which the second holding portions do not overlap the fasteners,        when viewed from a side direction of the fastener.-   (5) The connection fastener according to any one of (1) to (4),    wherein:    -   the connection portion is formed by bending one long sheet in a        C shape;    -   the first holding portions, the second holding portions, and a        band-shaped portion connecting the first holding portions and        the second holding portions are formed on the same plane in the        long sheet;    -   each of the fasteners includes a shank continuously provided        between the head portion and the leading end portion; and    -   in an axial direction of the fastener, a length of the shank is        shorter than a length of the band-shaped portion.-   (6) The connection fastener according to (5), wherein:    -   each fastener includes a stepped portion at the shank; and    -   the stepped portion is formed such that an outer diameter of a        leading end portion side is smaller than an outer diameter of        the head portion side, and faces an upper edge portion of the        attaching portion.-   (7) The connection fastener according to any one of (1) to (6),    wherein    -   each of the attaching portions includes a flange portion        protruding in an outer circumferential direction below the        second holding portion.-   (8) The connection fastener according to any one of (1) to (7),    wherein    -   each of the attaching portions includes a fall-preventing shape        for preventing the second holding portion from falling off.-   (9) The connection fastener according to (8), wherein the    fall-preventing shape is a tapered shape which diameter is gradually    increased toward a leading end portion side of the fastener.-   (10) The connection fastener according to (8), wherein the    fall-preventing shape is a stepped shape formed by making a large    diameter of the attaching portion in a leading end portion side of    the fastener or a concave shape of a circumferential groove shape.-   (11) The connection fastener according to (8), wherein the    fall-preventing shape is a bulgy shape in which the attaching    portion in the head side of the fastener is swollen in an outer    circumferential direction or a large diameter shape formed by making    a large diameter of the attaching portion in the head side of the    fastener.

What is claimed is:
 1. A connection fastener comprising: a plurality offasteners each of which includes a head portion provided at one endportion side and a tapered leading end portion provided at the other endportion side; a sheet-shaped connection portion that is configured toconnect the plurality of fasteners in a parallel direction; andattaching portions that are separate from the connection portionattached to the fasteners such that each attaching portion covers atleast one part of each leading end portion, wherein the connectionportion includes: first holding portions each of which is configured tosupport a head portion side of each fastener; and second holdingportions each of which is configured to support at least one part of acircumferential surface of each attaching portion.
 2. The connectionfastener according to claim 1, wherein: the connection portion includessecond holding holes which support the attaching portions provided atthe second holding portions, and first holding holes which support thehead portion sides of the fasteners provided at the first holdingportions; and diameters of the second holding holes are larger thandiameters of the first holding holes.
 3. The connection fasteneraccording to claim 1, wherein: the connection portion includes secondholding holes which support the attaching portions provided at thesecond holding portions, and first holding holes which support the headportion sides of the fasteners provided at the first holding portions;and opening widths of opening slits of the second holding holes arelarger than opening widths of opening slits of the first holding holes.4. The connection fastener according to claim 1, wherein: each of thefasteners includes a shank continuously provided between the headportion and the leading end portion; and the second holding portionssupport the attaching portions at positions at which the second holdingportions overlap the tapered leading end portions of the fasteners or atpositions at which the second holding portions do not overlap thefasteners, when viewed from a side direction of the fastener.
 5. Theconnection fastener according to claim 1, wherein: the connectionportion is formed by bending one long sheet in a C shape; the firstholding portions, the second holding portions, and a band-shaped portionconnecting the first holding portions and the second holding portionsare formed on the same plane in the long sheet; each of the fastenersincludes a shank continuously provided between the head portion and theleading end portion; and in an axial direction of the fastener, a lengthof the shank is shorter than a length of the band-shaped portion.
 6. Theconnection fastener according to claim 5, wherein: each fastenerincludes a stepped portion at the shank; and the stepped portion isformed such that an outer diameter of a leading end portion side issmaller than an outer diameter of the head portion side, and faces anupper edge portion of the attaching portion.
 7. The connection fasteneraccording to claim 1, wherein each of the attaching portions includes aflange portion protruding in an outer circumferential direction belowthe second holding portion.
 8. The connection fastener according toclaim 1, wherein each of the attaching portions includes afall-preventing shape for preventing the second holding portion fromfalling off.
 9. The connection fastener according to claim 8, whereinthe fall-preventing shape is a tapered shape which diameter is graduallyincreased toward a leading end portion side of the fastener.
 10. Theconnection fastener according to claim 8, wherein the fall-preventingshape is a stepped shape formed by making a large diameter of theattaching portion in a leading end portion side of the fastener or aconcave shape of a circumferential groove shape.
 11. The connectionfastener according to claim 8, wherein the fall-preventing shape is abulgy shape in which the attaching portion in the head side of thefastener is swollen in an outer circumferential direction or a largediameter shape formed by making a large diameter of the attachingportion in the head side of the fastener.